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• [email protected], 16.x , ,

  Fiber.expirationTime``Fiber.lanes	react-reconciler	Initial Lanes implementation #18796
  document rootNode,	legacy-events(), react-dom/events	changes-to-event-delegation

• [email protected]v17.0.0, 1 , ie11 , v8 .

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• reconciler
• scheduler
• fiber ()
• fiber ()
• fiber ()
• fiber

• hook ()
• hook ( Hook)
• hook ( Hook)
• context

• diff

• v16.13.1
• v17.0.1